Mushroom Wellington Recipe

This vegan mushroom wellington dish is fit for a holiday feast! Portobello mushrooms take the place of meat in this hearty wellington, and the result is a stunning, succulent, flavorful centerpiece. This recipe is so easy to follow and you can make it ahead of time, making it perfect for a stress-free holiday dinner party.

This post contains affiliate links. As an Amazon Affiliate, if you purchase through those links, I earn a small commission. Thank you!

We love a good Sunday dinner, and we love to tuck into a nut roast or lentil loaf, but we were craving mushrooms, so we created the oh-so-delicious vegan mushroom wellington!

Why you’ll love this delicious recipe

• It’s the perfect centerpiece for a Sunday, Thanksgiving, Christmas, or Easter dinner.
• Simple and easy to make, you don’t even need to use a food processor, so there is less mess!
• Make the day before so there’s less work to do on the day!
• All the ingredients are 100% vegetarian and vegan.

What ingredients do I need?

You’ll need all the ingredients shown in the photograph below.

Hands down, this is one of the most popular vegan thanksgiving recipes, even the meat eaters love it, it’s absolutely delicious!

How to make a mushroom wellington with step-by-step instructions

Making our vegan mushroom wellington is easy if you follow our simple instructions.

A complete printable recipe, along with the measurements in both US customary and metric, is available in the recipe card below.

Ensure that your vegan puff pastry is thawed; it needs to be cold but not warm.

For the mushroom filling

Add ½ tablespoon of olive oil to a large frying pan over medium heat, then add onions and balsamic vinegar.

Reduce the heat to low, season with kosher salt and pepper, and cook the onions until they are golden brown, stirring occasionally.

Once cooked, remove the caramelized onions from the pan and set them aside.

Return the pan to the heat and add your baby spinach and cook until it has wilted, then remove the cooked spinach from the pan and set it aside.

Return the pan to the heat and turn it up to medium-high heat.

Add 2½ tablespoons of olive oil and place the portobello mushrooms flat side down in the pan and cook until they are lightly golden brown, approximately 5 minutes.

Flip them over and cook until they are golden brown, approximately 5 minutes.

Remove them from the pan and place them on a kitchen towel to cool; cooked mushrooms release liquids, so the towel will absorb the liquid.

Preheat the oven to 390°F/200°C.

Line a baking sheet with parchment paper or a silicone baking mat, and place a puff pastry sheet on top.

Now, spread half of the onions over the middle third of the pastry sheet, leaving a ¾ inch border.

Next, add half of the spinach on top of the onions, then half of the toasted pecans, followed by the portobello mushrooms.

Then add the remaining onions, pecans, and spinach, followed by fresh rosemary and fresh thyme.

Now, carefully and gently roll the puff pastry sheet over the top of the mushroom mixture until you have a log shape.

Use your fingertips to press and seal the edges of the log and turn it over, so the seam is on the bottom.

Use a sharp knife to score a crosshatch pattern on the top of the mushroom wellington.

For the vegan egg wash

Melt your vegan butter and then add soy milk, and whisk to combine, and then use a pastry brush to lightly brush it lightly over the top of the pastry.

Place your mushroom wellington in the oven and bake until golden brown and flaky, approximately 35 minutes.

When cooked, serve immediately and enjoy!

Recipe notes and expert tips?

• Go gluten-free
  Use gluten-free puff pastry; that’s the only ingredient that contains gluten.
• Play with flavors
  Add some garlic, soy sauce, sage, or your favorite flavors.
• Make ahead
  Cook the filling the day before and assemble and cook when needed.
• Storage
  Keep covered in the fridge for up to 2 days, and freeze uncooked wellington for up to 2 months.

Why is it called a wellington?

Wellington, named after the Duke of Wellington, is a dish of meat (usually beef and foie gras) wrapped in pastry.

The beef wellington is said to have originated during the Napoleonic Wars when the Duke of Wellington led the British army to victory against Napoleon.

It was supposedly created by one of his cooks, who wrapped the beef in puff pastry to stay warm during battle.

Naturally, as we are vegetarians, we’ve adapted the classic beef wellington to use umami-rich mushroom caps, so the vegetarian wellington was born!

We have all the flavor with none of the meat.

Do I have to make my own puff pastry?

No, absolutely not.

We must confess to never making our own puff pastry; life’s too short for that!

We use store-bought puff pastry; it’s far easier than fiddling around making your own.

So, give yourself a break and use pre-made puff pastry!

What mushrooms should I use?

We’ve used smallish portobello mushrooms as we love the umami flavor they add.

You could experiment and use different mushrooms if you would like.

Can I make it ahead?

Yes, you can.

Follow the instructions right up until the point of laying the ingredients on the pastry sheet.

Don’t construct the wellington the day before because the pastry will become soggy.

How do I store leftover mushroom wellington?

Your mushroom wellington will keep for up to two days when covered and kept in the fridge.

You can also freeze uncooked mushroom wellington and bake it from frozen, although it may need longer to cook.

More vegetarian recipes for you to try

If you love our mushroom wellington recipe, you should try these delicious recipes.

• Nut roast
• Lentil loaf
• Mushroom risotto
• Tomato risotto
• Four cheese and mushroom lasagne

We hope you enjoy making and eating our mushroom wellington and would love to hear how you made it.

Please leave a comment below, and feel free to ask any questions you may have.

Follow us on Pinterest, Facebook, and Instagram, for more tasty inspiration!

You may also like…

Roasted Sweet Potato Cubes

Our roasted sweet potato cubes are a must-try! We take fresh sweet potatoes, cut them into bite-sized cubes, add perfect seasoning, and roast them to…

Perfect Pie Crust Recipe

Want to learn how to make the flakiest crust that will take your pies to another level? Our pie crust recipe is easy and uses…